Once the utility patent is filed, your utility patent filing claims the patent priority date as the provisional filing date. (smartuplegal.com)
The patent priority date is the date from which you have a legal claim as the first inventor to have invented the subject matter of your patent application. (smartuplegal.com)
You can petition for your husband as an LPR but he will have to wait until his visa becomes available on the 2A category - check the Visa Bulletin issued monthly by department of states to get an idea of current priority dates for that particular category. (rocketlawyer.com)